She tells you that she thinks she has some terrible disease. She worries out loud about maybe having been cursed or being attacked by some invisible entity.
You respond, but you cannot really respond. You’ve been here before, you know nothing you say will get through.
So you give one word answers and hope she gives up. You know the terror she feels cannot be reasoned with. Tell her to take her meds, and then leave her alone, because even when you are there with her, she is alone.
You are sure there has to be a better way, but you don’t have any clue what that way might be.